C4 Performance Energy has more caffeine than Sparkling Ice +Caffeine: 200mg vs 70mg in the same 16 oz can. That is a 130mg gap, and since the cans match, the per-serving number is the whole story.
Sparkling Ice +Caffeine vs C4 Performance Energy: the numbers
| Sparkling Ice +Caffeine | C4 Performance Energy | |
|---|---|---|
| Caffeine per serving | 70mg per 16 oz can | 200mg per 16 oz can |
| Caffeine per fl oz | 4.4mg | 12.5mg |
| Servings to reach 400mg (FDA context) | 5.7 | 2.0 |
Sources: Sparkling Ice +Caffeine's figure is verified in our Sparkling Ice +Caffeine caffeine guide against Caffeine Informer (source); C4 Performance Energy's figure is verified in our C4 Performance Energy guide against Caffeine Informer (source).
Which one should you pick?
Pick Sparkling Ice +Caffeine when you want the lighter dose or a slower ramp, and C4 Performance Energy when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Sparkling Ice +Caffeine: the full caffeine guide
- C4 Performance Energy: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Sparkling Ice +Caffeine or C4 Performance Energy have more caffeine? C4 Performance Energy: 200mg per 16 oz can versus 70mg per 16 oz can for Sparkling Ice +Caffeine.
Which is stronger per ounce? C4 Performance Energy, at about 12.5mg per fluid ounce versus 4.4mg for Sparkling Ice +Caffeine.
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